Filter



' fers-,Irs March l 1927' H. L. GUY ET AL FIL'ER Filed ADril lO.. 1920INVENTOR. Hcnvy' Lawns Guy 8: Thome hckbsk ATTORNEY Patented Mar. `1,1927.

UNITED STATES PATENT OFFICE.

HENRY LEWIS GUY AND THOMAS BLACKLOCK, F MANCHESTER, ENGLAND, SIGNORS T0WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A COB.-

PORATION 0F PENNSYLVANIA.

FILTER;

Application led April 10, 1920, Serial No. 372,922, and in Great BritainApril 15, 1919.

Our invention relates to oil filters and more particularly to devices ofthis character used for filtering or straining oil employed inlubricating systems. n

The object of the invention is to provide a filter of the characterdescribed which 4als may be easily assembled and dismantled and which iseiicient in operation.

Another object of the invention is the provision of an improvedstrainer. element which is simple in construction and'may be easily andcheaply made.

In the accompanying drawings Fig. 1 is a central vertical section of anoil filter constructed in accordance with the invention,Fig. 2 being asection to an'enlarged scale taken on the line II-II of Fig. 1.

Referring to the drawings, the filter comrises a vertical chamber 1having flanged inlets 2 and outlets 3 for the oil located respectivelynear the bottom and top oi' the chamber, preferably at the side thereof.The interior of the chamber l is provided near its upper end below theoil outlet with a ledge 4 adapted to support a diaphragm or plate 5dividing the chamber into an upper and a lower portion 6 and 7. Thedlaphragm or late 5 supports one or more oil strainers 8 1n positionwithin the chamber 1 and for this purpose is provided with acorresponding number of apertures 9 through which the oil strainers 8project. The latter are constructed somewhat in the form of a cartridgeand comprise a base 10 and a head piece 11 connected by an intermediateportion of perforated metal l2 for example. On the exterior of thelatter is wrapped a sheet of wire gauze 13 which forms the strainingmaterial. The edges of the wire auze 13 are preferably rein-l forced bystrips of sheet metal 14, and the meeting edges form a vertical buttjoint bein bent or otherwise so shaped as to be readily secured in.position bymeans of clips 16 or the like.

The clips 16 are formed of strips of metal, pressed into channel shapeand apertured'to embrace the butt joint formed by the meeting edges ofthe metal strips 14. They are attached to one of the meeting edges-byany suitable means, such as the rivets 22, forming a pivot by which theymay be moved into and out of locking engagement with the butt joint,thusv facilitating the application and removal of the wire gauze sheet13.

The head pieces 11 of the strainers are provided with lateral orifices17 below which is a flange 18 of somewhat greater diameter than theaperture 9 in the diaphragm or plate 5 through which the strainers 8project. 'lhe lid or cover 19 of the lter chamber'is provided on itsinner face with projections 2l which abut against the heads 11 of thestrainers 8 when the cover 19 is closed, thereby holding the strainers 8in position inthe diaphragm 5. The strainers 8 may be of any suitable.shape but are conveniently cylindrical. l

' One or more loaded non-return valves 2O are provided in .the diaphragm5 the purpose of which is to prevent the fiow of oil through the filterfrom being interrupted in the event of the strainer surfaces becomingchoked up.

In operation the oil enters the filter chamber 1 through the inlet 2 atitsA lower end and passes throughlthe wire gauze 13 into the interior ofthe strainers, flowing upwards through them and passing out through thelateral orifices 17 in their heads 11 into the portion of the filterchamber 6 above the diaphragm and thence through the outlet 3 leadingfrom the filter chamber at its upper end.

without difiiculty: The number .of individual strainers employed willvary according to the-area of straining surface 'which has 100 to be'provided and where the latter is considerable, the number of strainersemployed may, with advantage, be increased in order that the weightl ofthe individual strainers ma thelr being easily handled. x y

not become excessive and thus prevent lo;

While we have shown our invention in but one form, it will be obvious tothose skilled in the art that it is not so limited but is susce tible ofvarious other changes and modications lwithout departing from the spiritthereof and we desire, therefore, that only such limitations shall beplaced thereupon as are imposed by the prior art or as are specificallyset Sforth in the appended claims. 4 1

What we claim is:

1. A filter comprising al filter chamber, a diaphragm removablysupported Within the chamber and dividing the chamber into inlet andoutlet compartments, a lilter element mounted in the diaphragm throughwhich Huid normally passes from the inlet compartment to the outletcompartment, and a relief valve carried by the diaphragm and adapted topass liuid therethrough in parallel with said filter element uponclogging of the latter. i

2. A filter comprising a casing providing a chamber and having inlet andoutlet openings communicating therewith, a removable cover for saidcasing, a diaphragm disposed in the chamber between the inlet and outletopenings, and filter elements and a relief valve mounted in thediaphragm, the diaphragm being held in position by including the coverand being capab moval ufplon removal of the cover.

3. A ter comprising a casing providing a chamber and having inlet andoutlet opene of reings communicating therewith, an abutment in saidchamber between the inlet and outlet openings, a diaphragm disposedagainst said abutment and dividing said chamber into inlet and outletcompartments, the diaphragm being provided with openings, filterelements removably seated in openings in the diaphragm, a relief valvecarried by the diaphragm and adapted to pass uid therethrough inparallel with sald filter element upon clogging of the latter, thechamber being provided with an opening through which the diaphragm maybe inserted and removed and a cover for said opening, the cover whenclosed abutting against the filter elements and thereby retaining thefilter elements in the diaphragm and the diaphragm against the abutment.

4. In an oil lter, an elongated filter element comprising an aperturedinlet ort-ion and an apertured outlet portion, tering means lcoveringone of sai apertured portions, said ltering means provided withreinforced meeting edoes, and one or more clip elements pivotecf to oneof said edges and having a channel-like portion adapted to t over fthemeetin edges -to hold the filtering means in position.

In testimony whereof, we have hereunto subscribed our names thisItwelfth day of March, 1920. l

HENRY LEWIS GUY. THOMAS BLACKLOCK.

